physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
The rough surfaces are caused by biting the inside of the mouth. Biting the inside of the mouth causes this problem rather than relieves it. When you stop biting the inside of the mouth, the lips and cheeks will quickly become smooth again. Letâs focus on relaxing the mouth area. Begin with your jaw. Gently close your mouth so your teeth are together with slight pressure.